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Why is it important to carryout epidemiological studies
Importance of epidemiology essay
Why is it important to carryout epidemiological studies
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The purpose of epidemiology is to better understand the burden and causes of health issues in humans. This helps decrease the risk of disease and improve health. Infectious diseases are caused by micro-organisms, transmitted to humans by humans, animals, or environment. Infectious disease usually follow a recognizable pattern. In this paper Hepatitis B also known as serum hepatitis will be discussed. Hepatitis B is a viral infection that can cause acute or chronic disease. Hepatitis B is a communicable disease. This paper will describe Hepatitis B, the demographic of interest, the determinants of health, the epidemiologic triangle, environmental factors, the role of community health nurse, and a national agency that addresses Hepatitis B. The Communicable Disease, Hepatitis B Cause Hepatitis B Virus (HBV) is a virus that leads to infection of the liver. Infection of the HBV can be acute or lifelong (chronic). Humans are the only known host for HBV (CSC, 2017). This virus can survive on environmental surfaces for up to seven days (WHO, 2017). Symptoms In acute hepatitis one would see clinical symptoms more in adults than infants or children. Approximately fifty percent adults will not show any symptoms (CDC, 2017). Some clinical symptoms are nonspecific malaise, …show more content…
There is 1.4 million people infected with CHB in United States (CDC, 2017). Even though the incidence of CHB has decreased in the U.S. two ethnic groups with highest prevalence of CYB in U.S. are Asian with 1 in 12 Asian Americans have CHB, and 1in 10 African-born in U.S. has CHB (HepBMD, 2017). Approximately 90% of infants that get HBV becomes chronically infected and 1 out of 4 dies (CDC, 2017). A person with CHB is one hundred times more likely to develop liver cancer. An estimated 686,000 people die every year worldwide for complications of HBV 2,000 people in U.S. die yearly from HBV related liver
Hepatitis A is a usually short-acting virus that occurs in humans and monkeys. It is caused by the Hepatovirus and the species is Hepatitis A Virus. There are two major ways in which hepatitis A can be transmitted. One way is from person to person. This transmission occurs when the fecal matter of an infected person gets ingested by another person.
Hepatitis B virus infection is caused by a DNA virus belonging to the hepadnaviridae family of viruses. Approximately 2.2 million people in the United States of America are infected with Hepatitis B virus. Many of these patients, though they appear healthy, continue to spread the virus to others. Hepatitis B virus infection can be transmitted in the following ways: contact with contaminated blood (shared needles), sexual contact, and from mother to child. Unlike Hepatitis A, Hepatitis B is not spread through food, water, or causal contact. 95% of adults who get Hepatitis B can clear the virus through their system. However the remainder of the adults go on to develop chronic hepatitis B infection. This can
International Journal of Epidemiology 36.6 (2007): 1229-234. International Journal of Epidemiology. Oxford University Press, 28 Sept. 2007. Web. The Web.
Hepatitis B Virus (HBV) is a virus that attacks the liver. The virus is transmitted through blood and bodily fluids. This can occur through direct blood-to-blood contact, unprotected sex, use of contaminated needles, and from an effected mother to her newborn during the delivery process. The majority of people do not have noticeable symptoms when they are first infected with the HBV. People who do not know they are infected with the HBV, their body can respond in different ways. I learned that some of the common symptoms of Hepatitis B infection include fever, fatigue, muscle or joint pain, loss of appetite, mild nausea, vomiting, and dark-colored urine. Some of the serious symptoms that require immediate medical attention and maybe even hospitalization are: severe nausea and vomiting, yellow eyes and skin (jaundice), bloated or swollen stomach.
HAV is known to be an infectious disease that usually occurs in children and young adults .The disease is usually transmitted from person to person through contaminated food, liquids or oral fecal route. An example would be when someone is carrying the virus and doesn’t wash their hands after using the restroom and then puts food in their mouth. HAV is most common in developing countries because of the living conditions and inadequate water, poor sewage facilities and sanitary conditions. The highest HAV levels in the world are from India,” Earlier reports suggest that India is hyperendemic for HAV infection2,4-6 with very high infection rates,” (Sowmyanarayanan). Most HAV are without severe complications, “Virus HAV infection rarely causes fulminant hepatic failure in people…,” (Vento,p.1) . The symptoms for HAV are high fever, nausea, vomiting and jaundice...
Pathogens are a type of microorganism that spreads viral and bacterial diseases. These diseases when present in human blood and body fluids are known as blood borne pathogens, and can spread from one person to another. (Worcester polytechnic institute) The most serious types of blood borne diseases are the hepatitis B virus (HBV) and hepatitis C virus (HCV), which can cause liver damage; and HIV (human immunodeficiency virus), which is responsible for causing AIDS (acquired immune deficiency syndrome). The blood borne pathogens can be spread when the blood or body fluids (semen, vaginal fluid, breast milk, and amniotic fluid) of an infected individual comes into contact with mucous membranes or an open sore or cut on the skin of another person. Mucus membranes are located in the eyes, nose, mouth, and other areas as well. ("Bloodborne pathogens: MedlinePlus Medical Encyclopedia") Two of the most common ways that pathogens are transmitted is through the exchange of fluids during sexual intercourse or by sharing infected IV needles. (Worcester polytechnic institute)
Hepatitis B is a DNA viral infection that causes damage and inflammation to the liver. It was first discovered in 1965 by Dr. Baruch Blumberg. The HBV virus is very contagious and is even thought to be the most serious form of viral hepatitis and the most common viral infection on Earth. “HBV is 100 times more infectious than HIV.” (Green, 2002, pg. 7) The virus can survive for about one week outside the body on a dry surface. According to Green (2002, pg. 7), “One in twenty Americans has been infected with the virus at some point in their lives.” Between the ages of 15-39 is when 75% of new HBV infections occur, according to Green (2002, pg.8).
1a - Epidemiology of acute and chronic hepatitis B virus infection in Norway, 1992-2009 - Gražina Rimšelienė1,2*, Øivind Nilsen2, Hilde Kløvstad2, Hans Blystad2 and Preben Aavitsland2
Hepatitis A is a virus or an infection that causes liver disease and inflammation of the liver. According to Centers for Disease and Prevention, hepatitis A is a self- limited disease that does not cause a chronic infection and it is rarely fatal. The virus is an infectious disease of the liver which cannot be transmitted by sneezing and coughing. It is usually transmitted from person to person through the feces or the mouth, from consuming contaminated food or water. Many people do not experience any symptoms of hepatitis A, but if someone was to get it, then the symptoms could last from 2 weeks to 6 weeks. The blood is tested to determine how the liver is functioning. The blood is usually taken from the vein in the arm and
There is a disease spreading out in the world called Hepatitis C. It affects the liver and may cause the liver to fail. This disease is caused by a virus called Hepatitis C virus which is also known as HCV. About 32,000 people are affected with this disease per year only in the United States area. Some It’s a disease with many symptoms and many causes. of these symptoms are easy bruising, upset stomach and fever. These are just some of the many symptoms that come from the virus. Hepatitis Cs nature of the causative agent is determined by many things. The biological data of this disease is filled so much information. It is estimated that over 180 million people have gotten Hepatitis C and it is growing.
Hepatitis B, an infectious disease caused by the Hepatitis B virus (HBV, a DNA virus), was formerly called serum hepatitis, inoculation hepatitis and post-transfusion hepatitis. Infection with HBV may result in acute, fulminant or chronic hepatitis, sometimes even resulting in a chronic asymptomatic carrier state, apart from hepatocellular carcinoma and liver cirrhosis (Davis 179). The disease is transmitted when an individual comes in contact with infected blood or objects. It may also be transferred from an infected mother to her infant either during or after birth (Zuckerman et al. 211). Transmission may also occur by accidental inoculation from infected needles and hospital equipment, intravenous drug abuse, body piercing, tattooing, and mouth-mouth kissing (Zuckerman et al. 210). The risk of Hepatitis B is particularly high in individuals with multiple sex partners, and in homosexuals. The HBV virus occurs in morphologically different forms in the serum of infected individuals. HBV infection has an incubation period of about 75 days. Systemic symptoms of the disease include fatigue, fever, dyspepsia, arthralgia, malaise, and rash, while local symptoms include hepatomegaly, jaundice, dark urine, and pale stools (Davis 179; Zuckerman et al. 210).
Hepatitis B was the first of the hepatitis viruses to be discovered. There are seven genotypes for hepatitis B (Zein & Edwards, 2009). There are two forms of the disease, acute and chronic. Acute hepatitis B is a form which lasts less than six months, whereas chronic hepatitis B lasts from six months on. Symptoms of acute hepatitis B include: fever, abdominal upset, nausea, decreased appetite, vomiting, and changes in the way things taste or smell (Zein & Edwards, 2009). Some individuals infected with acute hepatitis B display symptoms, while others show no symptoms. Acute hepatitis B often goes undetected as a result.
Prevention of this virus would have been simple. There is a vaccine for Hepatitis B,however it wasn't used routinely until the 1980's , so many of these elderly may not have received it. In addition to this, there are ways to avoid transmission of Hepatitis B in this fashion (assisted monitoring of blood glucose). The personnel could have simply followed the rules and regulations set forth by the CDC for preventing transmission of blood-born pathogens. Outbreaks like this are less likely to occur in places like nursing homes because they are subject to federal regulations where these assisted living facilities are not. Federal regulation may help to prevent outbreaks like this also. Proper training of personnel in the area of blood-born pathogen transmission should be a requirement.
This assignment consists of two parts. Whereas part 1 will analyses the causes and impacts of health issues to individual, communities and nation. Also will address the preventive measure and methods to overcome from these health issues noted. Moreover in this part will discuss the understanding of global and national health priorities. On the other hand part B will give a comparison about the primary and secondary data of the global burden of disease with that of Maldives situation. Finally, there will be a conclusion based on the findings of this essay.
Discussions throughout this essay will focus on the relevance of epidemiology to public health; firstly the concepts of epidemiology will be discussed alongside two examples of why epidemiology is relevant in the 21st century.